Application under following conditions
Material |
acid |
alkaline |
organic solvent |
constant temp. |
remark |
Meta-Aramide |
no |
yes |
yes |
220°C |
not hydrolysis resistant,low acid restistant, highly restistant against alkaline |
Polyacryl- |
yes |
no |
yes |
125°C |
resistant against acid and hydrolsis satisfactory resistant, against alkaline |
Polyester |
yes |
no |
yes |
150°C |
best proved because of the quality of polyester fibre , but not hydrolysis resistant moderate resistant against alkaline |
Poly- |
yes |
yes |
no |
95°C |
very high mechanical stability acid and alkaline resistant |
Polyimide (P84) |
yes |
no |
yes |
260°C |
hydrolysis resistance depends on special conditions |
PTFE |
yes |
yes |
yes |
260°C |
resistant against nearly all chemical agents |
Fibre Glass |
yes |
yes |
yes |
260°C |
nonresistant against hydroflouric acid, good chemical resistance |